August 24, 2025

Feastical

Feastical

Black Sesame & Pumpkin Butter Mochi Cake

When Chewy Meets Cozy: Your New Favorite Fall Obsession

Hey foodie friend! Beau here, and I’ve got a confession: I’m completely obsessed with this Black Sesame & Pumpkin Butter Mochi Cake. Picture this: the nostalgic chew of Hawaiian butter mochi meets deep, toasty sesame and swirls of spiced pumpkin butter in a gluten-free showstopper that’ll make your kitchen smell like autumn heaven. 🍂✨

Remember that magical moment when you first bit into a perfectly chewy mochi? Now imagine it hugged by nutty black sesame and swirled with caramel-kissed pumpkin butter. That’s exactly what happened when I accidentally dumped leftover pumpkin butter into my sesame mochi batter last fall (oops turned into YUM!). This cake is everything: crackly golden edges, a bounce that’ll make you giggle, and flavors that dance between earthy and sweet. Perfect for potlucks, cozy nights, or when you need edible therapy. Best part? No fancy skills needed – just a bowl, a whisk, and your favorite baking pan. Ready to make magic? Let’s grab our spatulas!

That One “Happy Accident” in My Tiny Brooklyn Kitchen

Okay, real talk: this recipe was born from chaos! Two years ago, I was testing black sesame mochi cakes for Feastical’s Lunar New Year series. My then-boyfriend (now-husband!) Chris walked in with a jar of homemade pumpkin butter, bumped my elbow, and sploosh – half the jar plopped right into my batter. We stared at each other in horror… until the smell hit us while baking. That warm, spiced pumpkin aroma tangoing with roasted sesame? HEAVEN. We sliced it warm, ate it standing over the stove, and declared it our “Engagement Cake” (no ring, just crumbs on our shirts). Now every fall, Chris “accidentally” leaves pumpkin butter next to my mixing bowl. Food memories, right? They stick better than mochi to your teeth! 😉

Gathering Your Flavor Squad

Here’s your grocery list for this beauty! Pro tip: Measure everything before you start – mochi batter comes together fast!

  • 1 box (16 oz) mochiko – Sweet rice flour is the star! It creates that iconic chew. Chef insight: Don’t sub regular rice flour! Mochiko’s fine grind is key.
  • 1 cup granulated sugar – Balances sesame’s earthiness. Swap: Coconut sugar for caramel notes (reduce to ¾ cup).
  • 2 tsp baking powder – Lifts the dense mochi. Must be fresh – test with hot water if unsure!
  • 3 large eggs – Binds and enriches. Room temp blends smoother – soak in warm water 5 mins!
  • 1½ cups milk – Dairy or almond/coconut both rock. Insider hack: Use canned coconut milk for extra richness!
  • ½ cup unsalted butter, melted – Buttery backbone. Sub: Neutral oil, but butter’s flavor wins.
  • ½ cup black sesame paste – Find it at Asian markets or online. Chef save: Blend ¾ cup toasted seeds + 2 tbsp honey + 1 tbsp oil if desperate!
  • ½ cup pumpkin butter – Not pumpkin purée! Look near jams. DIY: Simmer 1 cup purée + ¼ cup maple syrup + pumpkin spice.
  • 1 tsp vanilla extract – Flavor harmonizer. Upgrade: Use vanilla bean paste for flecks!
  • Pinch of salt – Makes flavors pop! Sea salt recommended.

Let’s Bake Some Magic! (No Mochi Muscles Required)

Ready for the easiest dance in the kitchen? Follow these steps – I’ve tucked secrets in every fold!

  1. Preheat & Prep: Crank that oven to 350°F (175°C). Grease your 9×13″ pan like you mean it or line with parchment with overhanging edges (lifesaver for removal!). Beau’s Tip: Glass pans bake slower – add 5 mins if using!
  2. Whisk Dry Crew: In a large bowl, whisk mochiko, sugar, baking powder, and salt until no lumps remain. Secret: Sift if your mochiko’s clumpy! Lumps = chewy bombs later.
  3. Wet Team Unite!: In another bowl, whisk eggs, milk, melted butter, vanilla, and black sesame paste until velvety smooth. Hack: Whisk sesame paste with warm milk first to prevent clumping!
  4. The Big Merge: Pour wet ingredients into dry. Gently fold with a spatula just until combined – no overmixing! Batter will be thin like pancake mix. Watch: Overmixing = tough mochi. Lumps are FINE!
  5. Swirl Time!: Pour batter into pan. Dollop pumpkin butter across the top in blobs. Use a knife to marble – don’t overdo it! 4-5 figure-8s max. Pro Move: Warm pumpkin butter slightly for smoother swirling.
  6. Bake to Bouncy Bliss: Bake 50-60 mins. Edges should be golden-pull-away-from-pan, center set but with a slight jiggle (like Jell-O!). Critical: Test at 50 mins! A toothpick should come out with moist crumbs, not wet batter.
  7. The Patience Test: Cool COMPLETELY in pan on a rack (2 hours min). Truth Bomb: Cutting warm mochi = gummy disaster. Distract yourself with coffee!

Showtime! Plating Your Masterpiece

Slice into 16 squares (or 12 for generous servings!). For extra ✨wow✨: Dust with powdered sugar mixed with a pinch of cinnamon, or drizzle with warm honey. Pair with black coffee for breakfast (yes, breakfast – I won’t tell!) or vanilla ice cream for dessert. Serve on a dark plate to make those golden edges and black sesame POP! Pro tip: Stack squares on a cake stand – the height makes it look bakery-fancy.

The Science Behind the Chew: Why Mochi Magic Works

Ever wonder why mochi cakes have that addictive, bouncy texture? It all comes down to science—specifically, the magic of mochiko (sweet rice flour). Unlike regular wheat flour, mochiko is made from glutinous rice (don’t worry, it’s gluten-free!). The term “glutinous” refers to its sticky, stretchy nature, thanks to a high concentration of amylopectin, a type of starch that gelatinizes when heated.

When you bake mochi, the starch granules absorb liquid and swell, creating that signature chew. But here’s the kicker: overmixing or underbaking can ruin the texture. Overmixing develops too much elasticity, leading to a rubbery cake, while underbaking leaves it gummy. That’s why patience is key—waiting for the center to set ensures the perfect balance of softness and bounce.

Another secret? Fat and sugar control the chewiness. Butter (or coconut oil) coats the starch molecules, slowing gelatinization for a tender bite, while sugar interferes with starch bonding, preventing excessive toughness. That’s why this recipe nails it: the black sesame paste adds richness, and the pumpkin butter’s natural sugars caramelize into gooey pockets.

Fun fact: Mochi’s texture changes with temperature! Fresh from the oven, it’s pillowy-soft; cooled, it firms up but stays chewy. And if you refrigerate it? The starch retrogrades, turning it hard—so always serve at room temp or lightly warmed!


From Hawaii to Brooklyn: A Mochi Love Story

Mochi cakes have deep roots in Hawaii, where they evolved from Japanese mochi into a buttery, custardy treat thanks to local ingredients like coconut milk and butter. My grandma, a Honolulu native, made hers with a crackly top and custard-like center—a far cry from the dense mochi I’d tried in Japanese sweets.

When I moved to Brooklyn, I missed that nostalgic bite. But here’s the twist: New York’s seasonal flavors inspired this mashup. Black sesame? A nod to Chinatown’s sesame balls. Pumpkin butter? A fall farmers’ market staple. The result bridges my Hawaiian childhood and Brooklyn’s eclectic food scene.

Cultural fusion isn’t just trendy—it’s practical. Traditional mochi uses steamed rice, but mochiko (a post-WWII innovation) made it accessible. Similarly, this recipe swaps hard-to-find ingredients (like anko paste) with pantry staples. Pro tip: If you can’t find black sesame paste, toast seeds and blend with honey—it’s a game-changer!

And let’s talk about textural contrast. Hawaiian butter mochi is custardy, but this version leans chewier, with a crackly crust from the sugar caramelizing at the edges. It’s a hybrid that honors tradition while playing with modern flavors.


Mochi Cake Around the World: Global Variations to Try

Mochi’s versatility shines across cultures. Here’s how different regions riff on the concept—and how you can adapt this recipe:

  1. JapanDaifuku (soft mochi stuffed with red bean paste)

    • Twist: Fill cupcake-sized mochi cakes with anko before baking.

  2. KoreaChapssal-tteok (chewy rice cakes often paired with nuts)

    • Twist: Add chopped toasted walnuts to the batter.

  3. PhilippinesBibingka (coconut rice cake baked in banana leaves)

    • Twist: Line your pan with banana leaves and add grated coconut to the batter.

  4. ItalyCioccolato e Sesamo (a chocolate-sesame combo)

    • Twist: Swirl in Nutella instead of pumpkin butter.

  5. Modern Vegan: Flax eggs + coconut milk

    • Twist: Use aquafaba (chickpea brine) for extra lift.

Each version plays with starch, fat, and sweetness differently. For example, Filipino bibingka uses rice flour but leans savory with salted eggs. Korean tteok often skips butter for a pure chew. This recipe’s genius? It’s a blank canvas—swap the swirl, change the extract, or play with mix-ins like ube or matcha.

Mix It Up! 5 Tasty Twists

This recipe’s a canvas! Try these riffs:

  • Matcha Swirl: Replace pumpkin butter with ⅓ cup white chocolate-matcha spread
  • Chocolate Sesame: Add ¼ cup cocoa powder to dry ingredients, swirl with Nutella
  • Vegan Vibes: Use flax eggs (3 tbsp water + 1 tbsp ground flax = 1 egg), vegan butter, oat milk
  • Spiced Apple: Swap pumpkin butter for thick spiced apple butter
  • Coconut Dream: Use coconut milk + 1 tsp coconut extract, top with toasted coconut flakes

Beau’s Behind-the-Scenes Scoop

This cake evolved from my Hawaiian grandma’s butter mochi recipe – she’d chuckle at my “fancy” sesame twist! Originally, I used tahini… big mistake (too bitter!). After 14 tests, sweetened black sesame paste was the winner. Fun fact: Chris once ate a whole pan in 2 days and blamed our dog. Joke’s on him – I filmed it for Instagram! 🐕📸 Storage tip: Keep squares airtight at room temp 3 days (texture stays perfect!), or freeze layers with parchment for 3 months. Thaw at room temp – no microwave unless you want mochi gum!

Your Questions, My Answers!

Q: Why is my mochi cake gummy/gooey in the middle?
A: Classic culprit – underbaking or cutting too soon! Bake until the center *just* sets (no liquid wobble), and cool COMPLETELY. Mochi keeps cooking as it cools!

Q: Can I use regular sesame seeds?
A: Black sesame has deeper flavor, but white works in a pinch! Toast ½ cup seeds, grind to powder, mix with 2 tbsp honey + 1 tbsp oil to replace paste.

Q: Help! My swirl sank to the bottom.
A: Batter might’ve been too thin! Thicken with 1-2 tbsp extra mochiko next time. Also, don’t OVER-swirl – gentle marble tops stay put.

Q: Can I halve this recipe?
A: Absolutely! Use an 8×8 pan, bake 35-45 mins. Eggs divide best if you whisk 1 whole + 1 yolk, use half the white elsewhere.

Print
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Black Sesame & Pumpkin Butter Mochi Cake

Black Sesame & Pumpkin Butter Mochi Cake


  • Author: BeauCollier
  • Total Time: 3 hours 15 minutes

Description

Hey foodie friend! This chewy, cozy mochi cake combines the nostalgic bounce of Hawaiian butter mochi with the earthy nuttiness of black sesame and the warm, spiced sweetness of pumpkin butter swirls. Gluten-free and irresistibly aromatic, it’s perfect for autumn potlucks, cozy nights in, or whenever you need a little edible therapy. Ready to bake your way into fall magic? Let’s get whisking!


Ingredients

Scale
  • 1 box (16 oz) mochiko (sweet rice flour)

  • 1 cup granulated sugar (or ¾ cup coconut sugar for caramel notes)

  • 2 tsp baking powder (fresh)

  • Pinch of sea salt

  • 3 large eggs (room temperature)

  • 1½ cups milk (dairy, almond, coconut, or canned coconut milk for richness)

  • ½ cup unsalted butter, melted (or neutral oil, but butter’s flavor is best)

  • ½ cup black sesame paste (or homemade blend: ¾ cup toasted black sesame seeds + 2 tbsp honey + 1 tbsp oil)

  • ½ cup pumpkin butter (not pumpkin purée; see tips to make your own)

  • 1 tsp vanilla extract


Instructions

  • Preheat & Prep:
    Heat oven to 350°F (175°C). Grease your pan well or line with parchment paper, leaving edges hanging for easy removal.

  • Mix Dry Ingredients:
    Whisk together mochiko, sugar, baking powder, and salt in a large bowl until no lumps remain. (Sift if your mochiko is clumpy.)

  • Combine Wet Ingredients:
    In another bowl, whisk eggs, milk, melted butter, vanilla extract, and black sesame paste until smooth. To avoid lumps, whisk the sesame paste into warm milk first.

  • Mix Batter:
    Pour wet ingredients into dry. Gently fold with a spatula just until combined — batter will be thin and slightly lumpy. Overmixing will toughen the cake.

  • Swirl in Pumpkin Butter:
    Pour batter into prepared pan. Dot the surface with spoonfuls of pumpkin butter. Using a knife, gently swirl the pumpkin butter into the batter with 4-5 figure-8 motions — don’t overdo it!

  • Bake:
    Bake 50-60 minutes until edges are golden and pull away slightly from pan. Center should be set but have a slight jiggle (like Jell-O). Test by inserting a toothpick — it should come out with moist crumbs, not wet batter.

  • Cool Completely:
    Let the cake cool completely in the pan on a wire rack (at least 2 hours). Cutting too soon results in a gummy mess!

  • Serve:
    Slice into 16 squares. Dust with cinnamon powdered sugar or drizzle with honey if desired. Perfect with black coffee or vanilla ice cream!

Notes

  • Pumpkin Butter Substitute: Simmer 1 cup pumpkin purée with ¼ cup maple syrup and 1 tsp pumpkin pie spice until thick. Cool before using.

  • Black Sesame Paste Substitute: Toast ¾ cup black sesame seeds, grind finely, mix with 2 tbsp honey and 1 tbsp neutral oil until smooth.

  • Swirling: Warm pumpkin butter slightly for easier swirling. Avoid over-mixing swirl to keep the pretty marbled effect.

  • Storage: Keep leftovers airtight at room temp for 3 days or freeze with parchment paper between layers for up to 3 months. Thaw at room temp—microwaving can make it gummy.

  • Eggs: Use room temperature eggs for smoother batter. Soak cold eggs in warm water 5 minutes if needed.

  • Prep Time: 15 minutes
  • Cook Time: 50-60 minutes

Nutrition

  • Calories: 210 Cal 1 square approx.
  • Sugar: 14g
  • Fat: 9g
  • Carbohydrates: 30g
  • Protein: 4g

Nutritional Per Serving (approx 1 square)

Calories: 210 | Carbs: 30g | Fat: 9g | Sugar: 14g | Protein: 4g | Gluten-Free: Yes!

Final Thoughts: Why This Cake Wins Autumn

This Black Sesame & Pumpkin Butter Mochi Cake isn’t just dessert—it’s a sensory experience. The earthy sesame balances the spiced sweetness of pumpkin, while the texture rides the line between chewy, creamy, and crisp. It’s gluten-free without apologies, easy enough for beginners, and impressive enough for holidays.

Most importantly, it’s a reminder that the best recipes come from happy accidents (thanks, Chris!). So grab that mochiko, embrace the swirls, and let your kitchen smell like fall magic. And hey—if you “accidentally” eat half the pan? I won’t judge.

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